<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        {{message}}
    </div>
</body>
</html>
<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
<script>
    const { createApp } = Vue;
    createApp({
        data() {
            return {
                message: 'Hello Vue!'
            }
        },
        methods: {
            sayHello(){
                console.log(this.message);
            },
            sayBye(){
                console.log(this.message);
            }
        },
    }).mount('#app');
    
</script>